Determination of the chemical compounds
The chemical compounds of the EO was identified through a Thermofinnigan Trace GC/Trace DSQ/A1300, (E.I Quadrapole) equipped with a SGE-BPX5 MS capillary column (30 m x 0.25 mm i.d., 0.25 μm). All the conditions of GC-MS analyses were set according to Cetin et al., 2009. The components were identified based on the comparison of their relative retention time and mass spectra with those of standards’, Wiley 7N library data of the GC-MS system and literature data. The results were also confirmed by the comparison of the compounds elution order with their relative retention indices on non-polar phases re- ported in the literature